NEW ORLEANS (AP) — Weathered oil in the form of tar balls has washed ashore on some Louisiana beaches from Gulf waters churned by Hurricane Isaac and a state coastal official says it is likely from the 2010 Deepwater Horizon Disaster.

Garret Graves, a coastal adviser to Gov. Bobby Jindal, said the tar washed ashore in an area that was heavily oiled after the BP well accident, which released 200 million gallons of oil. Graves said tests are being done to determine the source.

Officials Tuesday evening restricted fishing in waters extending a mile off a roughly 13-mile stretch of coastline from Port Fourchon eastward to just west of Caminada Pass.

Recreational rod and reel fishing can continue but commercial and recreational shrimping, crabbing and commercial fin fishing was prohibited there.

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